Anthropic's Claude large language model is powering the majority of complex tasks for Amazon's new Alexa+, sources tell CNBC.

Alexa Plus will start rolling out next month in early access. It's an opt-in service and won't be available to everyone through an over-the-air update in March.

Amazon focused heavily on agentic AI features for Alexa+, including the ability to draft and send text messages and emails to contacts. This is not especially new or revolutionary given the recent agentic AI explosion in the tech world, but it's still worth talking about.